BME100 f2015:Group16 1030amL3

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Lab Write-Up 1 | Lab Write-Up 2 | Lab Write-Up 3
Lab Write-Up 4 | Lab Write-Up 5 | Lab Write-Up 6
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Steven Rojo
Jacob Baca
Nicolas March
Sudarshan Kandel
Javon Boaz
Aditya Konduri


Descriptive Statistics


Gold Standard: Standard Deviation: 1.13137 F Gold Standard: Average Temp.: 97.2 F Gold Standard: Standard Error: .8 F

Spree: Standard Deviation: 1.34749 F Spree: Average Temp.: 99.26737968 F Spree: Standard Error: .069676792 F


Gold Standard: Standard Deviation: 23.2322 bpm Gold Standard: Average HR: 88.3079 bpm Gold Standard: Standard Error: 1.212711

Spree: Standard Deviation: 22.99431bmp Spree: Average HR: 88.92493 bpm Spree: Standard Error: 1.200293


Heart Rate P-value: .309217 Pearson's R Correlation: .232224

Temperature P-value: 2.1*10^-68 Pearson's R Correlation: -0.00881

Average temp.jpg



With the Pearson's R value of the Heart Rate being close to 1, the headband has a direct relationship with the established Gold Standard, resulting in an increase/decrease of both at the relatively same scale, suggesting that the Spree headband measures heart rate relatively accurately.

In Temperature, the Pearson's R value is not close to 1, resulting in a lower correlation than that seen in the Heart Rate. This suggests that the Spree headband does not accurately measure body temperature.

The T-test value of the Temperature is smaller than .05, thus the spree has values that are greatly different than the one's seen in the Gold Standard. This results in the Spree Headband being deemed inadequate at measuring body temperature. In the Heart Rate t-test, the value was larger than .05, resulting in a minute difference with the Gold Standard's measurements. This means that the Spree is acceptable at measuring heart rates of people.


The Spree band had several design flaws that were innately built into it. For instance, the material used for the strap was an irritant to the ears, that constantly brushed against. Going along with this, the band kept loosing its tightness by sweat forming between the forehead and the band, and the straps were not holding the same amount of tightness. Another flaw that was found, was that the hard rectangular shape of the battery felt uncomfortable on the curvature of the head.

Recommendations would be that the battery have a slight curve so that the band would fit firmer on the forehead and a moisture absorbent on the sensor to prevent sweat-induced-sliding. With the straps, switch to a material that doesn't aggravate the skin and have the layout of the straps go above the ears to detract from the capability of brushing the ear. As for the tightness of the straps, have the back clip be more resistant to the flow of the straps. This would make adjusting the head band more difficult, but would preserve its length.

Temperature measurement was difficult using the spree headband, the 1, 2, 3, 4 integer scale is difficult to understand and not useful when looking for an exact temperature. Instead of using a four number integer scale, an actual temperature reading in degrees Fahrenheit or Celsius would be more user-friendly.


Target Population and Need

The item is initially for athletes who have to deal with large amounts of pressure on their feet, but could be utilized for everyday activities. The importance of this product is from the pain that people endure following extended periods of extensive activity. Their lives have adopted a nuisance that only holds them back from reaching even greater feats. With the inclusion Gel Shoxs in their active lives, little to any recovery would be necessary. The needs of the product are exemplified in the following graph:


Device Design

The design of the Gel Shox is that the shape fits all the contours of the human foot and still fit snug in the customer's shoes. An example of this is the inclusion of an arch on the side of the product to fit the user's anatomy. There are depressions in the product where there would be focal points on a foot. For instance, there is a large indentation at the back and five smaller ones at the front of decreasing sizes, on order for the heel and toes to fit comfortably onto the product. Going along with this specific design, the inside component of the material is composed of a non newtonian fluid that cushions the steps of the user so that the pressure created is administered to the gel. This in turn would allow the user to keep being active without the troubles of sore feet. Another aspect of the sole's design, is that there are hollow notched on the side do that when high amount of pressure is administered, the product would "flatten" instead of mushrooming inwards. If this was to occur, the material would cave in onto the user, inciting discomfort.


Inferential Statistics


Average for No Insert: 0.870043478 N

Standard Deviation of No Insert: 0.057160443 N

Standard Error: 0.011918776 N

Average for Dr. Scholls: 0.727826087 N

Standard Deviation of Dr. Scholls: 0.043165277 N

Standard Error: 0.009000582 N

Average for Gel Shoxs: 0.40826087 N

Standard Deviation of Gel Shoxs: 0.052885139 N

Standard Error: 0.011027314 N

P-value: 3.07278E-40

R-Correlation Non vs GS: -0.139512995

R-Correlation Dr. vs GS: 0.396503277


Average for No Insert: 2.130434783 N

Standard Deviation of No Insert: 0.056687201 N

Standard Error: 0.011820098 N

Average for Dr. Scholls: 1.91086956521739 N

Standard Deviation of Dr. Scholls: 0.078039212 N

Standard Error: 0.016272301 N

Average for Gel Shoxs: 1.059130435 N

Standard Deviation of Gel Shoxs: 0.058380651 N

Standard Error: 0.012173207 N

P-value: 8.28303E-58

R-Correlation Non vs GS: -0.145469794

R-Correlation Dr. vs GS: -0.344029454


Average for No Insert: 2.181304348 N

Standard Deviation of No Insert: 0.041484318 N

Standard Error: 0.008650078 N

Average for Dr. Scholls: 1.975217391 N

Standard Deviation of Dr. Scholls: 0.057117866 N

Standard Error: 0.011909898 N

Average for Gel Shoxs: 1.016086957 N

Standard Deviation of Gel Shoxs: 0.218689051 N

Standard Error: 0.045599819 N

P-value: 9.73664E-41

R-Correlation Non vs GS: -0.030475877

R-Correlation Dr. vs GS: 0.143992405


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